Universal tool-sharpener



H. PLUM.MEB-. UNIVERSAL TOOL SHARPENER.

APPLICATION FILED MAY s, 19H.

1359,27 1," Patented Nov. 16,1920.

Jmvwem ATTORNEZ UNITED STATES PATENT.- cmce.

HORACE rLuMMER; or onnrnn TOWNSHIP, HENDRICKS COUNTY, INDIANA.

j 'UNlIVERSAL 'rooL-sHARPEnEn.

Specification of Letters Patent. Patented N V. 16, 1920.

Application filed May 5, 1917.. Serial No. 166,697.

ence being bad to the accompanying draw- I ings, and to the letters and figures of reference marked thereon.

This invention relates to a portable toolapparatus of such construction as to permit of being readily moved as a unitary structure from place to place, as from one to another work-bench, and be capable of being used for sharpening gravers, chisels, drills and other cutting tools and also for regrinding screw-drivers and other instruments.

. Another object is to provide apparatus of the above-mentioned character, which shall be of simple and inexpensive construction. capable of being quickly and accurately adjusted so that tools or instruments may be quickly and accurately ground to various angles, and which shall be reliable, durable and economical in use. I

WVith the above-mentioned and other objects in view, the invention consists in .a machine that is adapted to carry, and adjustably support an oil-stone or abrading-block, the machine having means'for adjustably holding and guiding an. instrument in various positions relatively to the oil-stone; the invention consisting also further in the novel features of the apparatus. and in the parts and combinations and arrangements of parts, as hereinafter particularly described an further defined inthe accompanying claims.

Referring to thedrawings,-Figure 1 is atop plan of a universal tool-sharpener constructed substantially in accordance with the invention; Fig. 2 is an endview ofthe toolsharpener; Fig.3 is 'a plan view of a guidingcarrier whereby to holdand adjust the tool or instrument to be sharpened; Fig. 4 is a sideyiew of the tool sharpener: Fig. 5 is a central sectioriof the tool-carrier longi tudinally of its baseportion; Fig. 6 is a central section of the carrier transversely of its base portlon; Fig.7 is a fragmentary soctional elevation approximately on the line VIIVII on Fig. 2; and, Fig. 8 is a section of the tool-carrier approximately on the line VIII-VIII 011 Fig. 5. 7

Similar reference characters on the diff erent figures of the drawings indicate corresponding elements or features of construction herein referred to in detail.

. A practical embodiment of the invention comprises a main supporting base 1, which preferably is composed of hard wood and having a flat top surface, the base being oblong in plan. A pivot-head is provided which comprises a base plate 2, which is placed, uprightly against one end of the base and rigidly secured thereto by means of screws 3 and 3 and a head portion 4 rigidlyfixed on or integral with the plate, the head portion being supported above the plane of the top of the base ,1 and having a segmentally-rounded top. The front or,

outer side of the head portion preferably has a counter-bore 5 from the center of which extends a pivotal-screw 6, which is screwed into the head portion and has a head 7 thereon that is provided with a lex'er 8. A washer 9 is arranged on the pivotalscrew adjacent to the'head 7. a springwasher 10 being arranged on the pivotalscrew between the washerj9 and the head portion 4 and having a gap ll therein, one portion 12 norma ly standing out obliouelv from the plane of the spring-washer. Preferably the bottom of the main base 1 has a may be readily replaced by ano her o ditferent onality-orthi kness if ound d"sirable. The top of the base 1 has a ui e groove 1.5 therein th t extends longitudinal v ofthe base and p e erahlv nea one edge thereof-and the oil-s one ma v be fi er] more or less. by hand with one lower edge thereof in the groove. p

' .Ferh rpeew curatel .g id n on the main base and comprises an arm 16,

having-a groove 33 therein.

having a base portion 17 inwhich is a pivot hole 18 that receives the pivotal-screw 6, the

base portion being arranged between thev head portion 4 and the spring-washer 10, so that the arm may be tightly clamped by means of the pivotal-screw to the pivot-' head; a v cylindrical guide-bar 19 being rigidlyfixed to the arm 16, so as to be parallel-to the main base 1. Preferably the base portion 17 of the arm has a pointer mark 20 thereon, the top of the head portion 4 having graduated indicator marks 21 thereon to which the pointer maybe moved. The arm 16 may be variously adjusted 'when the pivotal-screw 6 is slightly slack ened. An improved carrier is provided which comprises a base portion 22, having a guide-bore 23 therein that receives the guide-bar 19 for guiding the carrier slidingly and also rotatively with respect to the guide-bar. I The carrier has alsoAtwo paral lel guide wings 24 and 25 that extend from the base portion 22, the'base portion and.

the Wings having a circular 'guideway 26 therein in which a cylinder 2? is rotatively arranged, being transversely to the guidebore' 23, the cylinder-being the main'part of a chuck. The .cylinder'has a longitudinal opening therein that hasa concave wall p01"-v tion 28 and. opposite angular portions 29 and 30,'thelatter portions forming a longitudinal V-shaped guide on which to securely seat the tool to be sharpened. The cylinder has also a transverse guideway therein, comprising portions 31" and 32, the wall of the'cylinder on oneside of the guideway A clamp-nut is provided which is designed to perform several-functionsand comprises a cylindrical main portion 34' that is fitted closely be tween the'wings 24 and 25 and has a head flange 35 thereon that is, arranged in the guideway. portion 31 and so as to extend intothe guldeway 26' to engage the adjacent portion of the wings, the cylinder thus being: retained 'in its guidewayQ The main portion 34' has ,a screw-threaded bore 36 therein-and also a head eon-r1337, whichis fixedl secured' to the" exterior ,of the main portion inf'clos e proximity to the: ends of the, gui'dewing's, which are circular, to perinit the cylinder toturn one-half of a revoration; A chuck-jaw 38 is arranged in the transverse gui'dewayfof the cylinder, so as V to operate in either; of the portions..31 or 32 and it has ,screw threaded stem 39 which isreceived in'the screw-threaded bore 36 of the nut, the stem and the nut together performing the function of a lever to rotate the cylinder." The chuck-jaw has: angular working fac es 40 and 41 to engage the tool or implement so as to "force the' latter tightly on to the seat faces 29 and 30. One side of the chuck-jaw has a guide projection 42 thereon that extends into'the groove 33 to be slidingly" guided therein, for preventing.

rotation of the jaw in its guideway. A graver 43, or its handle portlon 44 maybe securely clamped in the cylinder on rotation of the head collar .37 in the proper direction, or a 'screw-driver 45, or other instru- 'ment, may be similarly securely held in the justed in order to bring the faces of the I graver or other tool to the proper desired angle on the face of the oil-stone or abrading-block. The scale has a zero mark 48 on one side of the cylinder and a zero mark 49* on the opposite side of the cylinder, both marks being on the line parallel to the guide-bar 19, the degree mark 50'loeing on "a relatively right-angled line. 7

In practical use, a graver or similar tool is secured in the'carrier by means of the chuck devices, asin Figs. 1 and 2, or otherwise as maybe required, after which the arm 16 is adjusted so as to bring the guide bar 19 in'the required position to guide the tool on the top of the oil-stone. l/Vhen the nut wis'turned to'clamp the tool in place the flange 35 locks the cylinder 27"in-place.; After grinding one side, or face of the gravel", the cylinder is readjusted to the proper angle and again secured in place. Theoperator simply grasps the carrier and moves it to and 'fro along the guide-bar while pressing the tool with the pro'per degree of force on to. the oil-stone." In case it is-desired to grind'tlie end'of a screw driver true, the guide-bar 19 is set ."above the oil-stone, as in Fig. 4, and iffa screw:

driver requires resharpening, the guide-bar the graver is slightly curved and .in such iii) case. the oil-'stone'mayjbe readily tiltedjby hand and slightly rocked,while the grind ing operations are taking. place. Whendesired, insteadof turning thechuck cylinder, the carrier maybe removed and then replaced j in inverted position on .the guide bar.

Having thus described the invention, what is claimed as new is 1. A tool-sharpener including a base having a pivot-head fixed thereon, an abradingblock supported upon the base, an arm adjustably secured to the pivothead and having a cylindrical guide bar fixed thereon, and a carrier movable on the guide bar and provided with a chuck for holding the tool.

2. A tool-sharpener apparatus including a horizontally-supported guide bar, a carrie slidingly mounted on the guide bar, a cylindrical chuck rotatively mounted in the carrier, and means for operating the chuck comprising a rotatable screw-operated and screw-operating device to close the chuck and also securely lock the chuck to the carrier.

A. tool-sharpener. including a base for supporting an'abrading-block, a pivot-head rigidly connected to the base and having a binding-bolt connected thereto, an arm piv- Votally connected to the binding-bolt and thereby oadjustably secured to the pivothead, a cylindrical guide bar rigidly connected to the arm and extending parallel to the base, and a carrier mounted on the guide bar to slide or to turn thereon.

A tool-sharpener apparatus including a base having a pivot-head fixed thereon, an arm pivotally adjustable on the pivot-head, a cylindrical guide bar rigidly fixed to the arm, a carrier slidingly and rotatively guided on the guide bar, a chuck rotatively mounted in the carrier and having an opening to receive the tool, and means for simultaneously closing the chuck on the tool and locking the chuck to the carrier.

5. In a tool-sharpener, the combination with a base, of a pivot-head rigidly connected to the base and having a counter-bore in a vertical portion thereof, a pivotal binding screw extending through the counterbore and screwed into the pivot-head, the screw having a head on its outer end, a lever fixed to said screw head, a washer on saidscrew adjacent to the head, a springwasher on said screw between the pivot- Vhead and the first-mentioned washer, an arm on said screw between said pivot-head and said spring-washer to be adjustably secured to the pivot-head by said screw, and a guide bar rigidly connected to said arm to sup port and guide atool-carrier.

6. In a tool-sharpener, the combination with a cylindrical horizontal guide bar adjustably supported, of a tool-carrier comprising a base portion having a guide bore multaneously close said chuck and clamp I the same to said carrier.

7 In a tool-sharpener, the combination with a supported guide bar, of a carrier comprising a base portion slidingly supported on the guide bar and two parallelwings extending from the base portion, the edges of the wings being curved, thecarrier having a cylindrical-shaped guideway therein extending transversely with respect to the guide bar, a cylinder rotatively mounted in the guideway and having a longitudinal opening therein to receive the tool, the cylinder having also a transverse guideway therein-intersecting said opening, a jaw movably guided in the transverse guideway and having a screw-threaded stem that extends between said wings; and a nut comprising a. cylindrical main portion that is screwed said main portion having a flange to engage said Wings in the cylindrical guideway that guides said cylinder, and a head collar secured to said main portion of the nut opposite to the edgesof said wings.

In testimony whereof, I afiix my signature in presence of two witnesses.

HORACE PLUMMER.

' Witnesses:

E. T. SILvIUs, I. C. WASKOM. V

onto said stem and is guided by said wings, I 

